Implementation of Cubic Bezier tweening on SpriteKit framework similar to CSS style.
#import "SKBezierAction.h"
...
// See web for visual
// http://cubic-bezier.com/#.95,.05,.48,1.52
CGPoint toPos = CGPointMake(self.size.width * .5, self.size.height * .5);
SKAction *action = [SKAction moveTo:toPos duration:1 P1:CGPointMake(.95, .05) P2:CGPointMake(.48, 1.52)];
[sprite runAction:action];